Seasonal studies on alginate and its composition II: Turbinaria conoides (J.Ag.) Kütz. (Fucales, Phaeophyceae)

  • Sundararaju Jothisaraswathi
  • Bakthavachalam Babu
  • Ramasamy Rengasamy
Original Article


The alginates extracted from ‘leaf’, ‘stem’ and entire thallus of Turbinaria conoides (J.Ag.) Kütz. were investigated for their viscosity and biochemical constituents namely, β-D-mannuronic acid (M-block}), α-L-guluronic acid (G-Block) and alternating sequences of β–D-mannuronic acid and α-L-guluronic acid (MG-block). Substantial seasonal variation was recorded with high yield of alginate during premonsoon. The yield of alginate was maximum in ‘leaf’ region. In contrast to this, viscosity and G-block were maximum in the ‘stem’ region. A significant positive correlation was observed between viscosity and G-block}. The ratio of guluronic: mannuronic acid was also assessed. Low levels of M/G ratio were recorded in the ‘stem’ region followed by ‘leaf’ and entire thallus.


Co-polymer M-block MG-block G-block Seasonal variation Viscosity 


  1. Alankararao GSJG, Rajendra Prasad Y, Rama Rao K (1988) Alginic acid from Sargassum vulgare Bϕrgesen. Phykos 27:174–176Google Scholar
  2. Blumenkrantz N, Asboe-Hansen G (1973) New method for quantitative determination of uronic acids. Anal Biochem 54:484–489PubMedCrossRefGoogle Scholar
  3. Cheshire AC, Hallam ND (1985) The environmental role of alginates in Durvillaea potatorum (Fucales, Phaeophyta). Phycologia 24:147–153Google Scholar
  4. Haug A, Larsen B, Baardseth E (1969) Comparison of the constitution of alginates from different sources. Proc. VI Int. Seaweed Symp., pp 443–451Google Scholar
  5. Haug A, Larsen B, Smidsrϕd O (1967) Studies on the sequence of uronic acid residues in alginic acid. Acta Chem Scand 21:691–704CrossRefGoogle Scholar
  6. Haug A, Larsen B, Smidsrϕd O (1974) Uronic acid sequence in alginate from different sources. Carbohydr Res 32:217–225CrossRefGoogle Scholar
  7. Indergaard M, Skjak-Braek G (1987) Characteristics of alginate from Laminaria digitata cultivated in a high-phosphate environment. Hydrobiologia 151/152:541–549CrossRefGoogle Scholar
  8. Indergaard M, Skjak-Braek G, Jensen A (1990) Studies on the influence of nutrients on the composition and structure of alginate in Laminaria saccharina (L.) Lamour. (Laminariales, Phaeophyceae). Bot Mar 33:277–288Google Scholar
  9. Ji M, Cao W, Han L (1981) Determination of uronic acid components in alginic acid. Oceanol Limnol Sin 12:240–248Google Scholar
  10. Ji M, Wang Y, Xu Z, Guo Y (1984) Studies on the M:G ratios in alginate. Hydrobiologia 116/117:554–556CrossRefGoogle Scholar
  11. Kaliaperumal N, Kalimuthu S (1976) Changes in growth, reproduction, alginic acid and mannitol contents of Turbinaria decurrens Bory Bot Mar 19:161–178Google Scholar
  12. Lewis BA, Smith F (1969) Sugars and derivatives. In: Stahl E (ed), Thin layer chromatography. A Laboratory handbook. Springer-Verlag Berlin, Heidelberg pp 819–838Google Scholar
  13. Mairh OP (1982) Seasonal variation in alginic acid and viscosity of sodium alginate from a brown alga. Cystoseira indica (Thivy et Doshi) Mairh, from port okha. Seaweed Res. Utiln 5:43–46Google Scholar
  14. Miller IJ (1996) Alginate composition of some New Zealand brown Seaweeds. Phytochemistry 41:1315–1317CrossRefGoogle Scholar
  15. Nishide E, Anzai H, Uchida N (1987) Extraction of alginic acid from a Brazillian brown alga, Laminaria brasiliensis. Hydrobiologia 151/152:551–555CrossRefGoogle Scholar
  16. South GR (1979) Alginate levels in New Zealand Durvillaea (Phaeophyceae), with particular reference to age variations in D. antarctica. Proc. IX Int. Seaweed Symp, pp 133–142Google Scholar
  17. Umamaheswara Rao M, Kalimuthu S (1972) Changes in mannitol and alginic acid contents of Turbinaria ornata (Turner) J. Agardh in relation to growth and fruiting. Bot Mar 15:57–59CrossRefGoogle Scholar

Copyright information

© Springer Science + Business Media B.V. 2006

Authors and Affiliations

  • Sundararaju Jothisaraswathi
    • 1
  • Bakthavachalam Babu
    • 1
  • Ramasamy Rengasamy
    • 1
  1. 1.University of MadrasMadrasIndia

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